61270748365 has 4 divisors (see below), whose sum is σ = 73524898044. Its totient is φ = 49016598688.

The previous prime is 61270748353. The next prime is 61270748369. The reversal of 61270748365 is 56384707216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7202407689 + 54068340676 = 84867^2 + 232526^2 .

It is a cyclic number.

It is not a de Polignac number, because 61270748365 - 2⁵ = 61270748333 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61270748369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6127074832 + ... + 6127074841.

It is an arithmetic number, because the mean of its divisors is an integer number (18381224511).

Almost surely, 2^61270748365 is an apocalyptic number.

It is an amenable number.

61270748365 is a deficient number, since it is larger than the sum of its proper divisors (12254149679).

61270748365 is a wasteful number, since it uses less digits than its factorization.

61270748365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12254149678.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 61270748365 in words is "sixty-one billion, two hundred seventy million, seven hundred forty-eight thousand, three hundred sixty-five".